The orbit seems stable, as long as the point in which descent switches to ascent (and vice versa) stays the same. I noticed an anomaly in it's last time at the lowest point (perigee), the altitude report on the track was about 500km, but the listed altitude was 505km. I am not sure of the website though. I don't know if it has to do with the altitude of tracking stations or what, I am an amateur when it comes to this stuff.

All that being said, it has been up there for more than 24 hours and is most likely in a stable orbit, or else it would have burned up in re-entry by now.

As for it tumbling out of control, there is no way for any of us to know for sure. We have to take the word of the Authorities, Scientists, and Observers.

Let me re-iterate, the tumbling most likely refers to the way the satellite is pointed. It could be spinning every which way and still remain in orbit for years as a piece of expensive space junk.

Everyone in the world hates them. The best way to reunify North Korea with South Korea is to offer North Korean soldiers free McDonald's for a year and maybe give them a Hyundai if they lay down their weapons and peacefully cross the border to the South, never to return.